ISTQB-CTFL-KR 문제 86
프로그램은 제조 라인을 제어하는 데 사용됩니다(기계 켜기/끄기, 컨베이어 벨트 시작/중지, 흐름에 원자재 추가 등). 모든 작업이 항상 가능한 것은 아닙니다. 예를 들어, 비상 상황이 아닌 한 중지할 수 없는 특정 제조 단계가 있습니다. 테스터는 이러한 모든 사례(특정 작업이 허용되지 않는 경우)가 테스트에 포함되는지 평가하려고 시도합니다.
이 분석에 필요한 정보를 제공하려면 어떤 적용 범위 지표가 필요할까요?
이 분석에 필요한 정보를 제공하려면 어떤 적용 범위 지표가 필요할까요?
정답: D
Branch coverage is a type of structural coverage metric that measures the percentage of branches or decision outcomes that are executed by the test cases. A branch is a point in the code where the control flow can take two or more alternative paths based on a condition. For example, an if-else statement is a branch that can execute either the if-block or the else-block depending on the evaluation of the condition. Branch coverage ensures that each branch is taken at least once by the test cases, and thus reveals the behavior of the software under different scenarios. Branch coverage is also known as decision coverage or all-edges coverage.
Branch coverage is suitable for testing the cases where a specific action is not allowed, because it can verify that the test cases cover all the possible outcomes of the conditions that determine the action. For example, if the program has a condition that checks if the manufacturing stage can be stopped, then branch coverage can ensure that the test cases cover both the cases where the stage can be stopped and where it cannot be stopped. This way, branch coverage can help identify any missing or incorrect branches that may lead to undesired or unsafe actions.
The other options are not correct because they are not suitable for testing the cases where a specific action is not allowed. Code coverage is a general term that encompasses various types of coverage metrics, such as statement coverage, branch coverage, data flow coverage, etc. Code coverage does not specify which type of coverage metric is used for the analysis. Data flow coverage is a type of structural coverage metric that measures the percentage of data flow paths that are executed by the test cases. A data flow path is a sequence of statements that define, use, or kill a variable. Data flow coverage is useful for testing the correctness and completeness of the data manipulation in the software, but not for testing the conditions that determine the actions. Statement coverage is a type of structural coverage metric that measures the percentage of statements or lines of code that are executed by the test cases. Statement coverage ensures that each statement is executed at least once by the test cases, but it does not reveal the behavior of the software under different scenarios. Statement coverage is a weaker criterion than branch coverage, because it does not account for the branches or decision outcomes in the code. Reference = ISTQB Certified Tester Foundation Level (CTFL) v4.0 syllabus, Chapter 4: Test Techniques, Section 4.3: Structural Testing Techniques, Pages 51-54.
Branch coverage is suitable for testing the cases where a specific action is not allowed, because it can verify that the test cases cover all the possible outcomes of the conditions that determine the action. For example, if the program has a condition that checks if the manufacturing stage can be stopped, then branch coverage can ensure that the test cases cover both the cases where the stage can be stopped and where it cannot be stopped. This way, branch coverage can help identify any missing or incorrect branches that may lead to undesired or unsafe actions.
The other options are not correct because they are not suitable for testing the cases where a specific action is not allowed. Code coverage is a general term that encompasses various types of coverage metrics, such as statement coverage, branch coverage, data flow coverage, etc. Code coverage does not specify which type of coverage metric is used for the analysis. Data flow coverage is a type of structural coverage metric that measures the percentage of data flow paths that are executed by the test cases. A data flow path is a sequence of statements that define, use, or kill a variable. Data flow coverage is useful for testing the correctness and completeness of the data manipulation in the software, but not for testing the conditions that determine the actions. Statement coverage is a type of structural coverage metric that measures the percentage of statements or lines of code that are executed by the test cases. Statement coverage ensures that each statement is executed at least once by the test cases, but it does not reveal the behavior of the software under different scenarios. Statement coverage is a weaker criterion than branch coverage, because it does not account for the branches or decision outcomes in the code. Reference = ISTQB Certified Tester Foundation Level (CTFL) v4.0 syllabus, Chapter 4: Test Techniques, Section 4.3: Structural Testing Techniques, Pages 51-54.
ISTQB-CTFL-KR 문제 87
소프트웨어는 파일을 저장하는 데 1초도 안 걸리는 명시된 요구사항보다 훨씬 더 많은 시간이 걸리는 것으로 나타났습니다.
조사 결과 루프 내부에 불필요한 검사가 있어 파일 저장 작업이 느려지는 것으로 나타났습니다. 소프트웨어가 원하는 응답 시간을 충족하지 못하는 것이 그 예입니다.
조사 결과 루프 내부에 불필요한 검사가 있어 파일 저장 작업이 느려지는 것으로 나타났습니다. 소프트웨어가 원하는 응답 시간을 충족하지 못하는 것이 그 예입니다.
정답: D
A failure is an event in which a component or system does not perform a required function within specified limits. A failure is observable by the software users or other stakeholders. A failure is caused by one or more defects in the software. In this case, the software not being able to meet the desired response time is an example of a failure, as it deviates from the stated requirement and affects the user experience. It is not a defect, which is a flaw in the software that causes the failure. It is not an error, which is a human action that produces an incorrect result. It is not a non-defect, as it clearly violates a specified requirement. Verified Reference: [A Study Guide to the ISTQBFoundation Level 2018 Syllabus - Springer], Chapter 1, page 4.
ISTQB-CTFL-KR 문제 88
탐색적 테스트에 관한 다음 진술 중 어느 것이 사실입니까?
정답: B
Exploratory testing is an experience-based test technique in which testers dynamically design and execute tests based on their knowledge, intuition, and learning of the software system, without following predefined test scripts or test cases. Exploratory testing can be conducted following a session-based approach, which is a structured way of managing and measuring exploratory testing. In a session-based approach, the testers perform uninterrupted test sessions, usually lasting between 60 and 120 minutes, with a specific charter or goal, and document the issues detected, the test coverage achieved, and the time spent in session sheets. Session sheets are records of the test activities, results, and observations during a test session, which can be used for reporting, debriefing, and learning purposes. The other statements are false, because:
Exploratory testing is not a test technique in which testers explore the requirements specification to detect non testable requirements, but rather a test technique in which testers explore the software system to detect functional and non-functional defects, as well as to learn new information, risks, or opportunities. Non testable requirements are requirements that are ambiguous, incomplete, inconsistent, or not verifiable, which can affect the quality and effectiveness of the testing process. Non testable requirements can be detected by applying static testing techniques, such as reviews or inspections, to the requirements specification, before the software system is developed or tested.
Exploratory testing is not a test technique used by testers during informal code reviews to find defects by exploring the source code, but rather a test technique used by testers during dynamic testing to find defects by exploring the behavior and performance of the software system, without examining the source code. Informal code reviews are static testing techniques, in which the source code is analyzed by one or more reviewers, without following a formal process or using a checklist, to identify defects, violations, or improvements. Informal code reviews are usually performed by developers or peers, not by testers.
In exploratory testing, testers usually do not produce scripted tests and establish bidirectional traceability between these tests and the items of the test basis, but rather produce unscripted tests and adapt them based on the feedback and the findings of the testing process. Scripted tests are tests that are designed and documented in advance, with predefined inputs, outputs, and expected results, and are executed according to a test plan or a test procedure. Bidirectional traceability is the ability to trace both forward and backward the relationships between the items of the test basis, such as the requirements, the design, the risks, etc., and the test artifacts, such as the test cases, the test results, the defects, etc. Scripted tests and bidirectional traceability are usually associated with more formal and structured testing approaches, such as specification-based or structure-based test techniques, not with exploratory testing. Reference: ISTQB Certified Tester Foundation Level (CTFL) v4.0 sources and documents:
ISTQBCertified Tester Foundation Level Syllabus v4.0, Chapter 2.2.3, Experience-based Test Design Techniques1 ISTQBGlossary of Testing Terms v4.0, Exploratory Testing, Session-based Testing, Session Sheet, Non Testable Requirement, Static Testing, Informal Review, Dynamic Testing, Scripted Testing, Bidirectional Traceability2
Exploratory testing is not a test technique in which testers explore the requirements specification to detect non testable requirements, but rather a test technique in which testers explore the software system to detect functional and non-functional defects, as well as to learn new information, risks, or opportunities. Non testable requirements are requirements that are ambiguous, incomplete, inconsistent, or not verifiable, which can affect the quality and effectiveness of the testing process. Non testable requirements can be detected by applying static testing techniques, such as reviews or inspections, to the requirements specification, before the software system is developed or tested.
Exploratory testing is not a test technique used by testers during informal code reviews to find defects by exploring the source code, but rather a test technique used by testers during dynamic testing to find defects by exploring the behavior and performance of the software system, without examining the source code. Informal code reviews are static testing techniques, in which the source code is analyzed by one or more reviewers, without following a formal process or using a checklist, to identify defects, violations, or improvements. Informal code reviews are usually performed by developers or peers, not by testers.
In exploratory testing, testers usually do not produce scripted tests and establish bidirectional traceability between these tests and the items of the test basis, but rather produce unscripted tests and adapt them based on the feedback and the findings of the testing process. Scripted tests are tests that are designed and documented in advance, with predefined inputs, outputs, and expected results, and are executed according to a test plan or a test procedure. Bidirectional traceability is the ability to trace both forward and backward the relationships between the items of the test basis, such as the requirements, the design, the risks, etc., and the test artifacts, such as the test cases, the test results, the defects, etc. Scripted tests and bidirectional traceability are usually associated with more formal and structured testing approaches, such as specification-based or structure-based test techniques, not with exploratory testing. Reference: ISTQB Certified Tester Foundation Level (CTFL) v4.0 sources and documents:
ISTQBCertified Tester Foundation Level Syllabus v4.0, Chapter 2.2.3, Experience-based Test Design Techniques1 ISTQBGlossary of Testing Terms v4.0, Exploratory Testing, Session-based Testing, Session Sheet, Non Testable Requirement, Static Testing, Informal Review, Dynamic Testing, Scripted Testing, Bidirectional Traceability2
ISTQB-CTFL-KR 문제 89
다음 중 소프트웨어 테스트에서 좌측 이동 방식을 가장 잘 설명하는 것은 무엇입니까?
정답: C
ISTQB-CTFL-KR 문제 90
한 회사가 테스트 자동화 도구 평가를 위한 파일럿 프로젝트를 운영합니다. 다음 중 이 파일럿 프로젝트의 유효한 대상이 아닌 것은 무엇입니까?
정답: C
A pilot project is a small-scale experiment or trial that is conducted to evaluate the feasibility, effectiveness, and suitability of a test automation tool before implementing it on a larger scale1.
The objectives of a pilot project may vary depending on the context and scope of the test automation initiative, but some common ones are2:
To get familiar with the functionality and options of the tool
To check how the tool fits to the existing test processes and environment To assess the benefits and challenges of using the tool To decide upon standards and guidelines for tool implementation and usage To estimate the costs and resources required for tool deployment and maintenance Therefore, option C is not a valid objective of a pilot project, as it is not necessary to train all testers on using the tool at this stage. Training all testers on using the tool would be more appropriate after the tool has been selected and approved for full-scale implementation, and after the standards and guidelines have been established. Training all testers on using the tool during the pilot project would be inefficient, costly, and premature, as the tool may not be suitable or effective for the intended purpose, or may be replaced by another tool later.
Reference:
1: ISTQB Certified Tester Foundation Level Syllabus 2018, Version 4.0, p. 82
2: ISTQB Certified Tester Foundation Level Syllabus 2018, Version 4.0, p. 83
3: ISTQB Certified Tester Foundation Level Syllabus 2018, Version 4.0, p. 84
4: ISTQB Certified Tester Foundation Level Syllabus 2018, Version 4.0, p. 85
The objectives of a pilot project may vary depending on the context and scope of the test automation initiative, but some common ones are2:
To get familiar with the functionality and options of the tool
To check how the tool fits to the existing test processes and environment To assess the benefits and challenges of using the tool To decide upon standards and guidelines for tool implementation and usage To estimate the costs and resources required for tool deployment and maintenance Therefore, option C is not a valid objective of a pilot project, as it is not necessary to train all testers on using the tool at this stage. Training all testers on using the tool would be more appropriate after the tool has been selected and approved for full-scale implementation, and after the standards and guidelines have been established. Training all testers on using the tool during the pilot project would be inefficient, costly, and premature, as the tool may not be suitable or effective for the intended purpose, or may be replaced by another tool later.
Reference:
1: ISTQB Certified Tester Foundation Level Syllabus 2018, Version 4.0, p. 82
2: ISTQB Certified Tester Foundation Level Syllabus 2018, Version 4.0, p. 83
3: ISTQB Certified Tester Foundation Level Syllabus 2018, Version 4.0, p. 84
4: ISTQB Certified Tester Foundation Level Syllabus 2018, Version 4.0, p. 85
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